MODIFYING COMPOSITION, METHOD OF ITS PRODUCTION AND ITS APPLICATION IN ASPHALT-CONCRETE ROAD SURFACES IN VARIOUS CLIMATIC ZONES Russian patent published in 2012 - IPC C08L17/00 C08J11/06 C08J11/18 C04B26/26 C08L95/00 

FIELD: construction.

SUBSTANCE: modifying composition contains from 60 to 75 wt % of an active rubber powder with particle size of not more than 1 mm, a filler representing crushed mica or a mixture of crushed mica and diatomite, containing from 15 to 25 wt % of crushed mica and from 5 to 10 wt % of diatomite, from 1.0 to 2.5 wt % of an adhesive, and from 1.0 to 2.5 wt % of a structuring additive. The active rubber powder is a rubber powder with a developed specific surface, produced by thermomechanical grinding, or a rubber powder, chemically activated with a petroleum oil, or their mixture. The composition is produced by grinding the adhesive or the structuring additive to the size of not more than 0.8 mm. Afterwards the produced mixture is mixed with fillers and the active rubber powder. Then the mixture is thoroughly mixed. The composition is used as a stabilising additive for asphalt-concrete mixtures.

EFFECT: improved operational properties of asphalt-concrete surfaces when using a widely produced rubber powder with low specific surface in them.

37 cl, 6 tbl, 5 ex